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-rw-r--r--arch/arm/kernel/Makefile2
-rw-r--r--arch/arm/kernel/arthur.c1
-rw-r--r--arch/arm/kernel/asm-offsets.c1
-rw-r--r--arch/arm/kernel/entry-armv.S3
-rw-r--r--arch/arm/kernel/head.S57
-rw-r--r--arch/arm/kernel/module.c1
-rw-r--r--arch/arm/kernel/ptrace.c2
-rw-r--r--arch/arm/kernel/signal.c96
-rw-r--r--arch/arm/kernel/time.c4
-rw-r--r--arch/arm/kernel/traps.c47
-rw-r--r--arch/arm/kernel/vmlinux.lds.S11
11 files changed, 80 insertions, 145 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 3e1b0327e4d..c11169b5ed9 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -2,7 +2,7 @@
# Makefile for the linux kernel.
#
-AFLAGS_head.o := -DTEXTADDR=$(TEXTADDR) -DDATAADDR=$(DATAADDR)
+AFLAGS_head.o := -DKERNEL_RAM_ADDR=$(TEXTADDR)
# Object file lists.
diff --git a/arch/arm/kernel/arthur.c b/arch/arm/kernel/arthur.c
index a418dad6692..0ee2e981963 100644
--- a/arch/arm/kernel/arthur.c
+++ b/arch/arm/kernel/arthur.c
@@ -18,6 +18,7 @@
#include <linux/stddef.h>
#include <linux/signal.h>
#include <linux/init.h>
+#include <linux/sched.h>
#include <asm/ptrace.h>
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index c1ff4d1f1bf..04d3082a7b9 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -94,7 +94,6 @@ int main(void)
DEFINE(VM_EXEC, VM_EXEC);
BLANK();
DEFINE(PAGE_SZ, PAGE_SIZE);
- DEFINE(VIRT_OFFSET, PAGE_OFFSET);
BLANK();
DEFINE(SYS_ERROR0, 0x9f0000);
BLANK();
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 93b5e8e5292..be439cab92c 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -15,6 +15,7 @@
*/
#include <linux/config.h>
+#include <asm/memory.h>
#include <asm/glue.h>
#include <asm/vfpmacros.h>
#include <asm/hardware.h> /* should be moved into entry-macro.S */
@@ -310,7 +311,7 @@ __pabt_svc:
#if __LINUX_ARM_ARCH__ < 6 && !defined(CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG)
@ make sure our user space atomic helper is aborted
- cmp r2, #VIRT_OFFSET
+ cmp r2, #TASK_SIZE
bichs r3, r3, #PSR_Z_BIT
#endif
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 53962635134..8d8748407cb 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -21,6 +21,7 @@
#include <asm/procinfo.h>
#include <asm/ptrace.h>
#include <asm/asm-offsets.h>
+#include <asm/memory.h>
#include <asm/thread_info.h>
#include <asm/system.h>
@@ -33,52 +34,28 @@
#define MACHINFO_PGOFFIO 12
#define MACHINFO_NAME 16
-#ifndef CONFIG_XIP_KERNEL
/*
- * We place the page tables 16K below TEXTADDR. Therefore, we must make sure
- * that TEXTADDR is correctly set. Currently, we expect the least significant
- * 16 bits to be 0x8000, but we could probably relax this restriction to
- * TEXTADDR >= PAGE_OFFSET + 0x4000
- *
- * Note that swapper_pg_dir is the virtual address of the page tables, and
- * pgtbl gives us a position-independent reference to these tables. We can
- * do this because stext == TEXTADDR
+ * swapper_pg_dir is the virtual address of the initial page table.
+ * We place the page tables 16K below KERNEL_RAM_ADDR. Therefore, we must
+ * make sure that KERNEL_RAM_ADDR is correctly set. Currently, we expect
+ * the least significant 16 bits to be 0x8000, but we could probably
+ * relax this restriction to KERNEL_RAM_ADDR >= PAGE_OFFSET + 0x4000.
*/
-#if (TEXTADDR & 0xffff) != 0x8000
-#error TEXTADDR must start at 0xXXXX8000
+#if (KERNEL_RAM_ADDR & 0xffff) != 0x8000
+#error KERNEL_RAM_ADDR must start at 0xXXXX8000
#endif
.globl swapper_pg_dir
- .equ swapper_pg_dir, TEXTADDR - 0x4000
+ .equ swapper_pg_dir, KERNEL_RAM_ADDR - 0x4000
- .macro pgtbl, rd, phys
- adr \rd, stext
- sub \rd, \rd, #0x4000
+ .macro pgtbl, rd
+ ldr \rd, =(__virt_to_phys(KERNEL_RAM_ADDR - 0x4000))
.endm
-#else
-/*
- * XIP Kernel:
- *
- * We place the page tables 16K below DATAADDR. Therefore, we must make sure
- * that DATAADDR is correctly set. Currently, we expect the least significant
- * 16 bits to be 0x8000, but we could probably relax this restriction to
- * DATAADDR >= PAGE_OFFSET + 0x4000
- *
- * Note that pgtbl is meant to return the physical address of swapper_pg_dir.
- * We can't make it relative to the kernel position in this case since
- * the kernel can physically be anywhere.
- */
-#if (DATAADDR & 0xffff) != 0x8000
-#error DATAADDR must start at 0xXXXX8000
-#endif
-
- .globl swapper_pg_dir
- .equ swapper_pg_dir, DATAADDR - 0x4000
- .macro pgtbl, rd, phys
- ldr \rd, =((DATAADDR - 0x4000) - VIRT_OFFSET)
- add \rd, \rd, \phys
- .endm
+#ifdef CONFIG_XIP_KERNEL
+#define TEXTADDR XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+#else
+#define TEXTADDR KERNEL_RAM_ADDR
#endif
/*
@@ -279,7 +256,7 @@ __turn_mmu_on:
.type __create_page_tables, %function
__create_page_tables:
ldr r5, [r8, #MACHINFO_PHYSRAM] @ physram
- pgtbl r4, r5 @ page table address
+ pgtbl r4 @ page table address
/*
* Clear the 16K level 1 swapper page table
@@ -324,7 +301,7 @@ __create_page_tables:
/*
* Then map first 1MB of ram in case it contains our boot params.
*/
- add r0, r4, #VIRT_OFFSET >> 18
+ add r0, r4, #PAGE_OFFSET >> 18
orr r6, r5, r7
str r6, [r0]
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 1a85cfdad5a..6055e1427ba 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -11,6 +11,7 @@
*/
#include <linux/config.h>
#include <linux/module.h>
+#include <linux/moduleloader.h>
#include <linux/kernel.h>
#include <linux/elf.h>
#include <linux/vmalloc.h>
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index cd99b83f14c..9bd8609a292 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -782,7 +782,7 @@ static int do_ptrace(int request, struct task_struct *child, long addr, long dat
return ret;
}
-asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
+asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
{
struct task_struct *child;
int ret;
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index a94d75fef59..a917e3dd366 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -139,93 +139,33 @@ struct iwmmxt_sigframe {
unsigned long storage[0x98/4];
};
-static int page_present(struct mm_struct *mm, void __user *uptr, int wr)
-{
- unsigned long addr = (unsigned long)uptr;
- pgd_t *pgd = pgd_offset(mm, addr);
- if (pgd_present(*pgd)) {
- pmd_t *pmd = pmd_offset(pgd, addr);
- if (pmd_present(*pmd)) {
- pte_t *pte = pte_offset_map(pmd, addr);
- return (pte_present(*pte) && (!wr || pte_write(*pte)));
- }
- }
- return 0;
-}
-
-static int copy_locked(void __user *uptr, void *kptr, size_t size, int write,
- void (*copyfn)(void *, void __user *))
-{
- unsigned char v, __user *userptr = uptr;
- int err = 0;
-
- do {
- struct mm_struct *mm;
-
- if (write) {
- __put_user_error(0, userptr, err);
- __put_user_error(0, userptr + size - 1, err);
- } else {
- __get_user_error(v, userptr, err);
- __get_user_error(v, userptr + size - 1, err);
- }
-
- if (err)
- break;
-
- mm = current->mm;
- spin_lock(&mm->page_table_lock);
- if (page_present(mm, userptr, write) &&
- page_present(mm, userptr + size - 1, write)) {
- copyfn(kptr, uptr);
- } else
- err = 1;
- spin_unlock(&mm->page_table_lock);
- } while (err);
-
- return err;
-}
-
static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame)
{
- int err = 0;
+ char kbuf[sizeof(*frame) + 8];
+ struct iwmmxt_sigframe *kframe;
/* the iWMMXt context must be 64 bit aligned */
- WARN_ON((unsigned long)frame & 7);
-
- __put_user_error(IWMMXT_MAGIC0, &frame->magic0, err);
- __put_user_error(IWMMXT_MAGIC1, &frame->magic1, err);
-
- /*
- * iwmmxt_task_copy() doesn't check user permissions.
- * Let's do a dummy write on the upper boundary to ensure
- * access to user mem is OK all way up.
- */
- err |= copy_locked(&frame->storage, current_thread_info(),
- sizeof(frame->storage), 1, iwmmxt_task_copy);
- return err;
+ kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+ kframe->magic0 = IWMMXT_MAGIC0;
+ kframe->magic1 = IWMMXT_MAGIC1;
+ iwmmxt_task_copy(current_thread_info(), &kframe->storage);
+ return __copy_to_user(frame, kframe, sizeof(*frame));
}
static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
{
- unsigned long magic0, magic1;
- int err = 0;
+ char kbuf[sizeof(*frame) + 8];
+ struct iwmmxt_sigframe *kframe;
- /* the iWMMXt context is 64 bit aligned */
- WARN_ON((unsigned long)frame & 7);
-
- /*
- * Validate iWMMXt context signature.
- * Also, iwmmxt_task_restore() doesn't check user permissions.
- * Let's do a dummy write on the upper boundary to ensure
- * access to user mem is OK all way up.
- */
- __get_user_error(magic0, &frame->magic0, err);
- __get_user_error(magic1, &frame->magic1, err);
- if (!err && magic0 == IWMMXT_MAGIC0 && magic1 == IWMMXT_MAGIC1)
- err = copy_locked(&frame->storage, current_thread_info(),
- sizeof(frame->storage), 0, iwmmxt_task_restore);
- return err;
+ /* the iWMMXt context must be 64 bit aligned */
+ kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+ if (__copy_from_user(kframe, frame, sizeof(*frame)))
+ return -1;
+ if (kframe->magic0 != IWMMXT_MAGIC0 ||
+ kframe->magic1 != IWMMXT_MAGIC1)
+ return -1;
+ iwmmxt_task_restore(current_thread_info(), &kframe->storage);
+ return 0;
}
#endif
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index 69449a818dc..fc4729106a3 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -36,10 +36,6 @@
#include <asm/thread_info.h>
#include <asm/mach/time.h>
-u64 jiffies_64 = INITIAL_JIFFIES;
-
-EXPORT_SYMBOL(jiffies_64);
-
/*
* Our system timer.
*/
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index f6de76e0a45..45e9ea6cd2a 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -198,25 +198,16 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
barrier();
}
-DEFINE_SPINLOCK(die_lock);
-
-/*
- * This function is protected against re-entrancy.
- */
-NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
+static void __die(const char *str, int err, struct thread_info *thread, struct pt_regs *regs)
{
- struct task_struct *tsk = current;
+ struct task_struct *tsk = thread->task;
static int die_counter;
- console_verbose();
- spin_lock_irq(&die_lock);
- bust_spinlocks(1);
-
printk("Internal error: %s: %x [#%d]\n", str, err, ++die_counter);
print_modules();
__show_regs(regs);
printk("Process %s (pid: %d, stack limit = 0x%p)\n",
- tsk->comm, tsk->pid, tsk->thread_info + 1);
+ tsk->comm, tsk->pid, thread + 1);
if (!user_mode(regs) || in_interrupt()) {
dump_mem("Stack: ", regs->ARM_sp,
@@ -224,7 +215,21 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
dump_backtrace(regs, tsk);
dump_instr(regs);
}
+}
+
+DEFINE_SPINLOCK(die_lock);
+
+/*
+ * This function is protected against re-entrancy.
+ */
+NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
+{
+ struct thread_info *thread = current_thread_info();
+ console_verbose();
+ spin_lock_irq(&die_lock);
+ bust_spinlocks(1);
+ __die(str, err, thread, regs);
bust_spinlocks(0);
spin_unlock_irq(&die_lock);
do_exit(SIGSEGV);
@@ -345,7 +350,9 @@ static int bad_syscall(int n, struct pt_regs *regs)
struct thread_info *thread = current_thread_info();
siginfo_t info;
- if (current->personality != PER_LINUX && thread->exec_domain->handler) {
+ if (current->personality != PER_LINUX &&
+ current->personality != PER_LINUX_32BIT &&
+ thread->exec_domain->handler) {
thread->exec_domain->handler(n, regs);
return regs->ARM_r0;
}
@@ -481,29 +488,33 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
unsigned long addr = regs->ARM_r2;
struct mm_struct *mm = current->mm;
pgd_t *pgd; pmd_t *pmd; pte_t *pte;
+ spinlock_t *ptl;
regs->ARM_cpsr &= ~PSR_C_BIT;
- spin_lock(&mm->page_table_lock);
+ down_read(&mm->mmap_sem);
pgd = pgd_offset(mm, addr);
if (!pgd_present(*pgd))
goto bad_access;
pmd = pmd_offset(pgd, addr);
if (!pmd_present(*pmd))
goto bad_access;
- pte = pte_offset_map(pmd, addr);
- if (!pte_present(*pte) || !pte_write(*pte))
+ pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
+ if (!pte_present(*pte) || !pte_write(*pte)) {
+ pte_unmap_unlock(pte, ptl);
goto bad_access;
+ }
val = *(unsigned long *)addr;
val -= regs->ARM_r0;
if (val == 0) {
*(unsigned long *)addr = regs->ARM_r1;
regs->ARM_cpsr |= PSR_C_BIT;
}
- spin_unlock(&mm->page_table_lock);
+ pte_unmap_unlock(pte, ptl);
+ up_read(&mm->mmap_sem);
return val;
bad_access:
- spin_unlock(&mm->page_table_lock);
+ up_read(&mm->mmap_sem);
/* simulate a write access fault */
do_DataAbort(addr, 15 + (1 << 11), regs);
return -1;
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 0d5db5279c5..80c8e4c8cef 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -6,14 +6,23 @@
#include <asm-generic/vmlinux.lds.h>
#include <linux/config.h>
#include <asm/thread_info.h>
+#include <asm/memory.h>
OUTPUT_ARCH(arm)
ENTRY(stext)
+
#ifndef __ARMEB__
jiffies = jiffies_64;
#else
jiffies = jiffies_64 + 4;
#endif
+
+#ifdef CONFIG_XIP_KERNEL
+#define TEXTADDR XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+#else
+#define TEXTADDR KERNEL_RAM_ADDR
+#endif
+
SECTIONS
{
. = TEXTADDR;
@@ -95,7 +104,7 @@ SECTIONS
#ifdef CONFIG_XIP_KERNEL
__data_loc = ALIGN(4); /* location in binary */
- . = DATAADDR;
+ . = KERNEL_RAM_ADDR;
#else
. = ALIGN(THREAD_SIZE);
__data_loc = .;